Harry s



(No Model.)

H. S. PELL. WATER TUBE BOILER.

Patented Jan; 2 1 894.

mew]! xf fell,

HARRY S. PELL, OF AKRON, OHIO.

WATER-TUBE BOILER.

s'PECIFIGATION forming part of Letters Patent No. 512,213, dated January2, 1894..

Application filed April 21, 1893.

T0 40% whom it may concern:

Be it known that I, HARRY S. PELL, a citizen of the United States,residing at Akron, in the county of Summit and State of Ohio, haveinvented new and useful Improvements in ater-Tube Boilers, of which thefollowing is a specification.

This invention relates to water tube steam boilers, of the typecomposed. of a plurality of steam drumsand mud drums.

The object of my invention is to provide a new and improved constructionwhereby the capacity of the boiler is largely increased, and the spaceoccupied is materially reduced, while the consumption of fuel iseconomized and the escaping gasesof combustion are tion. Fig. 2 is ahorizontal sectional view.

taken on the line 2-2, Fig. 1. Fig. 3 is a vertical sectional view takenon the line 33, Fig. 2; and Fig. 4 is a vertical sectional view taken onthe line 4-4, Fig. 2. v

In the drawings the reference numeral] indicates the steam-drum, and 2denotes the water-drum, or, as it is sometimes termed, the mud-drum ofeach boiler in the battery. These drums are arranged with the steamdrumdirectly over the water-drums, the axes of the two being substantiallyin the same vertical line. The steam-drum 1 of each boiler is connectedwith the water-drum 2 by straight, vertical water-tubes 3, arranged ingroups, banks, or gangs, all the members of which are of the same lengthand have their ends expanded directly into the tube-sheets i of theupper and lower drums 1 and 2. The water-drums are supported in asetting of brick 5, of suitable character, and the steam-drums have likesupport and inclosure in the upper part of a brick setting 8, which isusually of greater length than breadth, and preferably rectangular inform, though Serial No. 471,352. (No model.)

not necessarily so. I prefer to make the tube sheets of these drums fiatand arrange, them in substantial parallelism with each other orpractically so, in order to'preserve a uniform length of the water-tubes3, and to expose every portion of the adjacent surfaces of said drums tothe heat.

The battery of boilers is composed of four steam-drums l and acorresponding number of water-drums 2, connected in the mannerdescribed. The plurality of steam-drums or drum-sections l have intercommunication one with another, by means of legs, or passages 6, one ormore being provided between the adjacent portions of the cylindricalwalls of said drum-sections. The water-drums 2 are in like mannerconnected by means of similar legs 7. In both cases, these legs arearranged in the septa 8 of brick, or other suitable material, whichseparate the drum-sections of one boiler from those of another.

The boiler-sections are placed in pairs and the pairs are arranged intwo parallel series, the members of one pair alternating with those ofthe other, as seen in the sectional plan View Fig. 1. The boiler-furnace14 is placed in front, the heat passing therefrom to the foremost boilerof the series standing nearest to the rear of the furnace. The membersof this series are separated by a bafflewall 25 from each other, and abaffle-tile 26 is placed about midway the water-tubes of the firstboiler-section. In rear of the first series, or pair of boiler sections,is a space 27 communicating by a lateral passage 28 with the chamber inwhich the second series, or pair of boiler-sections is arranged, whichis separated from the chamber containing the first series, or pair by awall 29. The members of the alternating pair of boiler-sections in thesecond chamber are separated by a hanging baffle-Wall 30, Fig. l.Between the rear of the furnace and the nearest member of the secondpair of boiler-sections is a draftspace 31, leading to the chimney orstack and between this space and the chamber containing the second pairof boiler-sections is a Wall 32, rising to a suitable height to directthe products of combustion over the water-tubes in the boiler-sectionsnearest the furnace.

Blow-off pipes 33 are connected to the lowest points of the water-drums2, the drum of the rearward boiler-section being extended downward alittle below the lowest points of the other drums. As the circulation isless active in the rearward section, by reason of the less degree ofheat received by said rear section, I prefer to extend the water-drum alittle lower, both to attract the deposition of sediment to this drumand to extend the same below the bottom of the exit-flue leading to thestack.

I may employ more than four boilers in battery, and in so doing thearrangement shown inclusive may be followed, by merely extending orduplicating the features shown. The arrangement is one which largelyeconomizes the cubic space required and renders the heat produced by thefuel available to the maximum extent.

Having thus described myinvention, what I claim isboiler-sections of thesecond series, and a draft space leading to the stack between the lastboiler-section of the second series and the furnace; substantially asdescribed.

2. In a water-tube boiler, thecombination with the two alternatingseries of boiler'sections each section being composed of a steamdrum anda water-drum connected by vertical water-tubes, and the drums in eachsection being connected by legs with the corre sponding, adjacent drumsin the same section, of a wall separating the two series and HARRY s.PELL.

Witnesses:

E. A. BELFORD, J. S. COSTIGAN.

